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A platform for research: civil engineering, architecture and urbanism
Preparation of high flexural strength rankinite cement benefiting from formation of aragonite whisker during carbonation curing
This study centers on a novel approach of high flexural strength rankinite (3CaO·2SiO2, abbreviated as C3S2) cement benefiting from in-situ formation of aragonite whisker (AW) during carbonation curing. The manufacturing parameters including MgCl2 concentration and reaction temperature play key influence on formation of AW. The results showed that high temperature favored AW formation and AW with length-diameter ratio of 15 ∼ 30 could be generated with concentration of Mg2+/Ca2+ molar ratio of 0.1 at 70 °C. Under this condition, the flexural strength of the C3S2 cement reached 7.5, and 15.6 MPa after 3d and 28d and the corresponding compressive strengths were 30.2 and 71.1 MPa, respectively. The results also showed that 40.9% of CO2 by mass was consolidated in rankinite paste after 48 h, suggesting a promising prospect for calcium silicate-containing waste residue and cement to capture CO2 and simultaneously manufacturing high-performance materia.
Preparation of high flexural strength rankinite cement benefiting from formation of aragonite whisker during carbonation curing
This study centers on a novel approach of high flexural strength rankinite (3CaO·2SiO2, abbreviated as C3S2) cement benefiting from in-situ formation of aragonite whisker (AW) during carbonation curing. The manufacturing parameters including MgCl2 concentration and reaction temperature play key influence on formation of AW. The results showed that high temperature favored AW formation and AW with length-diameter ratio of 15 ∼ 30 could be generated with concentration of Mg2+/Ca2+ molar ratio of 0.1 at 70 °C. Under this condition, the flexural strength of the C3S2 cement reached 7.5, and 15.6 MPa after 3d and 28d and the corresponding compressive strengths were 30.2 and 71.1 MPa, respectively. The results also showed that 40.9% of CO2 by mass was consolidated in rankinite paste after 48 h, suggesting a promising prospect for calcium silicate-containing waste residue and cement to capture CO2 and simultaneously manufacturing high-performance materia.
Preparation of high flexural strength rankinite cement benefiting from formation of aragonite whisker during carbonation curing
Huo, Zhen (author) / Lu, Bao (author) / Sun, Jinfeng (author) / Jiang, Ruiyu (author) / Hou, Guihua (author) / Ji, Shidong (author) / Naguib, Hamdy M. (author)
Journal of Sustainable Cement-Based Materials ; 13 ; 738-753
2024-05-03
16 pages
Article (Journal)
Electronic Resource
English
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